use tauri::State;
use serde::{Deserialize, Serialize};
use tracing::{info, error, debug};

use crate::database::DatabaseManager;
use crate::database::schema::ContentItem;
use crate::error::{AppError, Result as AppResult};

#[derive(Debug, Serialize, Deserialize)]
pub struct ContentResponse {
    pub id: String,
    pub title: String,
    pub content_type: String,
    pub platform: String,
    pub category: String,
    pub content: String,
    pub thumbnail_path: Option<String>,
    pub usage_count: i64,
    pub quality_score: f64,
    pub is_active: bool,
    pub is_featured: bool,
    pub created_at: String,
    pub updated_at: String,
}

impl From<ContentItem> for ContentResponse {
    fn from(item: ContentItem) -> Self {
        // Parse content_data JSON to extract additional fields
        let content_data = item.content_data.as_ref()
            .and_then(|data| serde_json::from_str::<serde_json::Value>(data).ok());
        
        Self {
            id: item.id,
            title: item.title.unwrap_or_default(),
            content_type: "text".to_string(), // Default type since not in ContentItem
            platform: item.platform,
            category: "general".to_string(), // Default category since not in ContentItem
            content: item.text.unwrap_or_default(),
            thumbnail_path: None, // Not in ContentItem schema
            usage_count: 0, // Not in ContentItem schema
            quality_score: 0.0, // Not in ContentItem schema
            is_active: item.status == "published",
            is_featured: false, // Not in ContentItem schema
            created_at: chrono::DateTime::from_timestamp(item.created_at, 0)
                .map(|dt| dt.format("%Y-%m-%d %H:%M:%S UTC").to_string())
                .unwrap_or_default(),
            updated_at: chrono::DateTime::from_timestamp(item.updated_at, 0)
                .map(|dt| dt.format("%Y-%m-%d %H:%M:%S UTC").to_string())
                .unwrap_or_default(),
        }
    }
}

#[derive(Debug, Serialize, Deserialize)]
pub struct CreateContentRequest {
    pub title: String,
    pub content_type: String,
    pub platform: String,
    pub category: String,
    pub content: String,
    pub metadata: Option<serde_json::Value>,
}

/// 获取内容库列表
#[tauri::command]
pub async fn get_content_library(
    content_type: Option<String>,
    platform: Option<String>,
    category: Option<String>,
    limit: Option<i32>,
    offset: Option<i32>,
    db: State<'_, DatabaseManager>
) -> Result<Vec<ContentResponse>, String> {
    info!("Fetching content library with filters");
    
    // TODO: 实现内容库查询逻辑
    // 暂时返回空列表
    Ok(vec![])
}

/// 创建内容项
#[tauri::command]
pub async fn create_content_item(
    request: CreateContentRequest,
    db: State<'_, DatabaseManager>
) -> Result<String, String> {
    info!("Creating content item: {}", request.title);
    
    // TODO: 实现内容创建逻辑
    let content_id = uuid::Uuid::new_v4().to_string();
    
    info!("Content item created: {}", content_id);
    Ok(content_id)
}

/// 更新内容项
#[tauri::command]
pub async fn update_content_item(
    content_id: String,
    updates: serde_json::Value,
    db: State<'_, DatabaseManager>
) -> Result<(), String> {
    info!("Updating content item: {}", content_id);
    
    // TODO: 实现内容更新逻辑
    
    Ok(())
}

/// 删除内容项
#[tauri::command]
pub async fn delete_content_item(
    content_id: String,
    db: State<'_, DatabaseManager>
) -> Result<(), String> {
    info!("Deleting content item: {}", content_id);
    
    // TODO: 实现内容删除逻辑
    
    Ok(())
}

/// 上传媒体文件
#[tauri::command]
pub async fn upload_media(
    file_path: String,
    content_type: String,
    db: State<'_, DatabaseManager>
) -> Result<String, String> {
    info!("Uploading media file: {}", file_path);
    
    // TODO: 实现媒体文件上传和处理逻辑
    // 包括文件验证、格式转换、缩略图生成等
    
    let media_url = format!("media/{}", uuid::Uuid::new_v4());
    
    info!("Media uploaded successfully: {}", media_url);
    Ok(media_url)
}

/// 生成内容缩略图
#[tauri::command]
pub async fn generate_thumbnail(
    content_id: String,
    media_path: String,
    db: State<'_, DatabaseManager>
) -> Result<String, String> {
    info!("Generating thumbnail for content: {}", content_id);
    
    // TODO: 实现缩略图生成逻辑
    
    let thumbnail_path = format!("thumbnails/{}.jpg", content_id);
    
    info!("Thumbnail generated: {}", thumbnail_path);
    Ok(thumbnail_path)
}

/// 搜索内容
#[tauri::command]
pub async fn search_content(
    query: String,
    filters: Option<serde_json::Value>,
    limit: Option<i32>,
    db: State<'_, DatabaseManager>
) -> Result<Vec<ContentResponse>, String> {
    info!("Searching content with query: {}", query);
    
    // TODO: 实现内容搜索逻辑
    // 支持全文搜索、标签搜索等
    
    Ok(vec![])
}

/// 获取推荐内容
#[tauri::command]
pub async fn get_recommended_content(
    platform: String,
    account_id: Option<String>,
    limit: Option<i32>,
    db: State<'_, DatabaseManager>
) -> Result<Vec<ContentResponse>, String> {
    info!("Getting recommended content for platform: {}", platform);
    
    // TODO: 实现内容推荐算法
    // 基于历史使用、质量评分、平台适配度等
    
    Ok(vec![])
}

/// 标记内容为已使用
#[tauri::command]
pub async fn mark_content_used(
    content_id: String,
    db: State<'_, DatabaseManager>
) -> Result<(), String> {
    info!("Marking content as used: {}", content_id);
    
    // TODO: 增加使用计数，更新最后使用时间
    
    Ok(())
}

/// 评价内容质量
#[tauri::command]
pub async fn rate_content(
    content_id: String,
    rating: f64,
    db: State<'_, DatabaseManager>
) -> Result<(), String> {
    info!("Rating content {} with score: {}", content_id, rating);
    
    // TODO: 更新内容质量评分
    
    Ok(())
}